Question # 1

Which LINUX command is used to update the modification time of a file.

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UPDATE

MODIFY

TOUCH

UNTOCUH

Kernel minimizes the frequency of disk access by keeping a pool of internal data buffer which helps to increase the response time this is known as.

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Buffer cache

Spooling

Pooling

Virtual memory

How many links are created when we create a directory file.

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1

2

3

4

Which command is used to determine the path of an executable file.

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which

whom

locate

wex

All device files are stored in which directory.

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/etc

/dev

/www

/html

For multiprogramming operating system.

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Special support from processor is essential

Special support from processor is not essential

Cache memory is essential

None of abvoe

Which operating system use write through catches.

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UNIX

XENIX

ULTRIX

DOS

Size of virtual memory depends on

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Size of data bus

Size of address bus

Size of main memory

None of above

To avoid the race condition the number of process that may be simultaneously inside the critical section is

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1

3

0

12

Super visor state is only allowed to.

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Utility softwares

Application sotware

Operating system

Guest user

Scissoring enables

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A part of data to be displayed

Entire data to be displayed

Full data display on full area of seen

No data display

Which command in LINUX is used for description any command.

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Help

Man

Detail

Short detail

Remote computing services involves the use of.

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Multi processing

Multi programming

Batch processing

Real time processing

By which command content of a file can be searched.

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grep

search

srh

show

Which command is concerned with LINUX kernel log messages.

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dmsg

dmesg

cmsg

cmesg

In real time OS, which is most suitable scheduling scheme.

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Round robin

FCFS

Pre-emptive scheduling

Random scheduling

Belady anomaly occurs in

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Optimal replacement

FIFO

LRU

Both in FIFO and LRU

What the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer users productivity.

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Defined values

Fixed values

Default values

None of the above

In which scheduling policies context switching never takes place

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FCFS

Round robin

Shortest job first

Pre empitive

What are the global locks.

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They synchronize access to local resources.

They synchronize access to global resources

They synchronize access to local and global resources

None of above

What is the name of values that are automatically provided by software to reduce keystrokes.

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Data values

Default values

Defined values

Fixed vallues

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